Coal igniter



Sept. 1e. 1924. 1,508,403

J. T. C. LOMBARDI COAL IGN'ITER Filed Jan. 30

' a citiienV of the United States of America,

Paiemeasspa 1e, 1a24.

UNHTD s TENT' JOHN T. C. LOMBARDI, OF BROOKLYN, NEW YORK, ASSIGNOR T HANSN & -ALOM BABDI, A. PARTNERSHIP GOMPOSED OF EDWARD J'. HANSEN AND JOHN T. O. LOM- BABDI, BOTH OF BROOKLYN, YORK.

com. iemrnn.-

Application led January 30, 1924. Serial No. 689,432.

To all 'whom t may concern.'

Be it known that I, J oHN T. C. LOMBARDI,

residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Coal 4gllginiters, of which the following is a speciiication.

My invention relates to an apparatus and Aa method for the lighting of a coal fire from under the grating of the stove.

My invention has for its object to furnishv a flame of illuminating gas of sufiicient heat intensity to ignitel the coal from bottom through the metallic grating on which the coal rests.

My invention has also for an object to thoroughly mix the air necessary for combustion with the gas before ignition in a large and elongated mixing chamber, supported on adjustable legs and so propor- V. nosed that it win in inside the ash cham- Vber of an ordinary coal stove.

My invention has for further yan, object to furnish an adjustable gas and air injector through which the gas and air are injected into the mixin chamber in proportions nec- .essary for per ect combustion..

In the drawing Figures 1 and 2 show the method and general arrangement for the lighting of a coal fire in a conventional coal stove. l

Figures 3, 4v and 5- show the detail construction of the mixing chamber for gas and air.

Figures 6 and 7 show the detail construction of the gas and air injector.

Referring to the drawing in which like reference characters designate corresponding parts, 1 represents the stove in which the coal fire 2. isto be lit.

' The gas and air mixing chamber 3 is placed in thev ash chamber 4 below the metallic grating 5 and the supporting legs 6 are so adjusted that the proper distance is kept between the grating 5 and the mixing chamber 3. l

A- gas and air injector 7 supplied with an adjustable shutter 8 admits the air necessary for erfectv combustion into the mixing chamer 3 through the passage 9. v

The injector 7 is supplied with a hose attachment 10 for the gas tube 11 which is coected to a convenient f. jet.

the gas duct 12.

The gas duct 12 terminates in'a reducing nozzle 13 throu h which the illuminating gas will escape into the mixing chamber 3 with considerable velocity and in so doing will drag atmospheric air' with it thrcu h thev air passage 9 which is controlled by t e adjustable shutter 8.

On top ofthe mixing chamber 3 there is a row of small openings 14 each of whichy will become the source of a flame 15 when the as is'lit.

en ignition of a coal fire takes place through the metallic grating the intensity of heat has to be exceptionally high as a considerable amount of heat is,carried away by the metallic grating.

In order to obtainan illuminating gas iame of suiicient heat intensity to overcome this loss of heat and also to rapidly light the coal fire it has been found necessary to thoroughly mix the proper amount of air with the illuminatin gas' in an especiallyconstructed air cham er 3 of spacious dimensions.

The mixing chamber 3 is an elongated hollow casting of triangular cross section. The illuminating gas escapes into the mixing chamber 3 from the injector 7 rin a manner diagrammatically shown in Figure 4,

The gas which enters through the narrow as duct 12 at a high velocity escapes t rough the flame holes 14 at a greatly reduced velocity as the total area o the ameholes 14 ismuch larger than the area of The excess energy has been used up in settingup whirls in the large mixing chamber 3 which causes a thorough mixing of the gas and air.

It is to be noted that the gas discharge takes place at the mostA spacious part of the triangular cross section and the ilame holes are provided at the narrowest part ol the triangular cross section, viz, the top.

'llhus before a suiiicient pressure can be created to force the gas mixture up throu h the narrow top section and out through t e flame holes a thorough diffusion will take place in the spacious bottom part said diffusion being materially assisted by the change of momentum which must take place prior to the discharge through the lateral row of dame holes.

lt is also to be noted that due to the triangular cross section of the mixing chber 3 the upwards How of gas Will mcrease the in the `adaptation of the device to various conditions, Without departing from the spirit and scope of my invention.

l claim l. A long and straight mixing chamber for illuminating gas and air having a triangular cross section, an end inlet through which the gas escapes directly intosaid mixing chamber in a longitudinal direction at a high velocity dragging the air with it through passages in direct communication with the atmosphere, the gas mixture being free to expand unobstructed longitudinally in said chamber causing whirls to be set up in the entire length of said elongated mixing chamber prior to the discharge through dame rhoehne holes provided atthe apex oli the triangular l.

cross section.

2. A long and straight mixing chamber for illuminating as and air having a cross section wider at t e bottom than at the top an end inlet through which the gas escapes' directly into' said mixing chamber' in a lonf gitudinal direction at a high velocity dragging the air with it throu h passages in direct vcommunication with t e atmosphere, the gas mixture being free to expand unobstructed longitudinally in said' chamber causing whirls. to be set up in the entire length of said elongated mixing chamber prior to the discharge through a rovv oit flame holes provided in the narrovv'top part of said chamber.

3. A long and straight mixing chamber for illuminating gas and air having a trian' 

